What is silicon powder
Microsilica, also known as silica powder or quartz powder, is an ultra-fine powder made from natural or synthetic silica (SiO2). This micropowder is usually found in nature in the form of quartz, but can also be synthesized artificially through methods such as chemical vapor deposition. Silicon powder is a very important industrial raw material, silicon powder has a wide range of uses in many industrial applications, especially in the construction, ceramics, coatings and plastics industries.
Basic properties of silicon powder
Silicon powder is a kind of inorganic nanomaterial with SiO2 as the main component. It has an amorphous or partially crystalline structure, its morphological characteristics can be regulated, its particle size distribution is more uniform, and it has a large specific surface area.
Chemical composition: Silicon powder is mainly composed of silicon dioxide (SiO2), which is a compound of silicon and oxygen through covalent bonds. In silicon powder, the content of SiO2 is usually as high as more than 99%, with a high purity.
Crystal structure: The crystal structure of the silicon powder belongs to the amorphous or partially crystalline structure. Unlike most crystalline materials, the silicon atoms in the silicon powder are disordered and have no long-term periodic structure. This makes the silicon powder have a large surface area and special physical and chemical properties.
Morphological characteristics: The morphological characteristics of silicon powder can be adjusted according to the preparation method and application requirements. Generally speaking, silicon powder is white or gray fine powder, and its particle shape can be spherical, flake, rod or fiber. The morphology of silicon powder has an important influence on its application in different fields.
Particle size distribution: The particle size of silicon powder is usually based on the nanometer level, generally between 1 nm and 100 nm. The particle size distribution of the silicon powder can be controlled by the preparation process to meet the needs of different applications.
Specific surface area: Silicon powder has a very large specific surface area due to its highly fine particles. This means that at the same mass, the silicon powder has more surface contact areas than the larger particle material. This makes the silicon powder have excellent adsorption properties, catalytic activity and chemical reactivity.
What are the characteristics of silicon powder
1. High purity: Silicon powder has extremely high purity and almost no impurities. This makes it widely used in fields such as electronics, optics and biotechnology.
2. Good stability: Silicon powder has good thermal stability and chemical stability, and is not easy to react with other substances. This allows it to maintain its performance at high temperatures.
3. Low density: The density of silicon powder is very low and the specific surface area is large, so the volume and weight of the material can be greatly reduced in many applications.
4. Good insulation: Silicon powder has good insulation, so it is widely used in the electronics industry to manufacture semiconductors and other electronic components.
5. Wear resistance: Silicon powder has excellent wear resistance, so it is widely used in abrasives, ceramics and coatings industries.
6. Environmental protection: Silicon powder is a renewable resource that can be obtained through mineral extraction and other means, so it has little impact on the environment.
Silicon powder has become an indispensable material in the field of modern science and technology because of its high purity, good stability, low density, good insulation, strong wear resistance and environmental protection.
Application field of silicon powder
Building materials: Silica powder can be used as an admixture of cement and concrete to improve the strength, durability and crack resistance of the material. It can also be used to prepare high-performance mortar, tiles, tiles and waterproof materials.
Rubber industry: Silicon powder is a commonly used rubber filler that can be used to improve the wear resistance, aging resistance and mechanical properties of rubber. It can also increase the hardness and strength of rubber products.
Plastics industry: Silicon powder can be used as a filler for plastics to improve the mechanical properties, thermal stability and dimensional stability of plastics. It can increase the stiffness, hardness and weather resistance of plastic products.
Coatings and coatings: Silica powder is widely used as a filler for coatings and coatings to improve the wear resistance, corrosion resistance and weather resistance of coatings. It can also improve the gloss and touch of the coating.
Cosmetics: Silicon powder can be used in cosmetics such as foundation, loose powder and honey powder, with oil absorption, oil control, increase shine and provide smooth texture effect.
Electronics industry: Silicon powder can be used as an additive to semiconductor materials to improve the performance of semiconductor devices. It can also be used to prepare thermal paste and insulation materials.
Ceramic industry: Silicon powder is a key ingredient in the production of high quality ceramic products. It can be used to adjust the viscosity of the ceramic paste so that it flows more easily and is evenly distributed throughout the mold. In addition, silicon powder can also improve the hardness and wear resistance of ceramic products.
In addition to the above areas, silicon powder is also widely used in rubber tires, paper and paint industries. With the continuous progress of technology and the increase of demand, the application prospect of silicon powder in more fields is still very broad.